xinguo639 xinguo639

23-04-2018
Mathematics

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Cedric has 1 red pen, 1 blue pen, and 1 black pen in his desk. If he randomly takes two of them from his desk without replacement, what is the probability that he will take the blue and black pens?

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ayeboi2017 ayeboi2017

23-04-2018

maybe it is a 1 out of 3 probability

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